SECTION 6
Performance Verification
6.1 INTRODUCTION
6.3 INITIAL CONDITIONS
The procedures outlined in this section may be used to
verify that the instrument is operating within the limits
stated in the specifications at the front of this manual. Per-
formance verification may be performed when the in&u-
ment is first received to ensure that no damage or misad-
justment has ocurred during shipment. Verification may
also be performed whenever there is a question of in&u-
ment accuracy, or following calibration, if desired,
NOTE
If the instrument is still under warranty (less than
one year from the date of shipment), and its per-
formance falls outside the specified range, contact
your Keith& representative or the factory to deter-
mine the correct course of action.
6.2 ENVIRONMENTAL CONDITIONS
Accuracy checks should be made at 18’ to 28°C and at less
than 70% ~lative humidity.
The Model 263 must be turned on and allowed to warm
up for at least one hour before beginning the verification
procedures. If the instrument has been subject to extremes
of temperature (outside the ranges specified in paragraph
6.2), additional time should be allowed for internal
temperatures to reach normal operating temperature.
Typically, it takes one additional hour to stabilize a unit
that is 10°C (WF) outside the specified temperature range.
6.4 RECOMMENDED TEST EQUIPMENT
Table 6-1 lists all test equipment required for verification.
Alternate equipment may be used as long as the substitute
equipment has specifications at least as good as those listed
in the table.
NOTE
The verification limits in this section do not include
test equipment tolerance. The limits for all ac-
curxy checks are derived from the 90 day accuracy
specifications of the Model 263.
Table 6-1. Recommended Test Equipment
Description
Specifications
I
1 Manufactures; Model
I
5% digit DMM
Picoammeter
Resistance Calibrator
Volts; 5Oppm Keithley; 196
2OpA, 2OOpA, 1.6% Keithley; 617
2nA-2oonA; 0.25%
~/IA-2mA; 0.15%
lk0; lO8.5ppm Fluke; 5450A
IOldz; 68ppm
lOOkQ; 59ppm
lM0; 61.5
low; 12 l
pm
ppm
lOOM0; 620ppm
Keithiey; 4804
Female Triax to Male BNC
Adapter
Female BNC to Male Dual
Banana Adapter
I-
Pomona; 1269
Dual Banana to Banana Cable
-
Keithley; CA-W1
6-l
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